Zanzibar 1895 QV 2a Small Second Z & Overprint Double with Cert

1895-96 QV 2a blue Type 1 ovpts with varieties "SMALL SECOND "Z" and OVERPRINT DOUBLE (SG 7[D]m). Superb M example, fresh colour. Rare stamp! Photo-cert: BPA. (cv£275+). Only one pane of 60 existed, as proven by a lower marginal pair (SG Auctions 22/5/1968, lot 235) which must have come from setting 2 or 3. Ex Griffith-Jones. See additional image and of certificate.